Fatal error: [File:D:\build\++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Util.cpp] [Line: 991] Interfaces.CopyCommandList->Close() failed at D:\build\++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12CommandList.cpp:303 with error E_IN

Development Programming & Scripting
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1

Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Util.cpp] [Line: 991]
Interfaces.CopyCommandList->Close() failed
at D:\build++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12CommandList.cpp:303
with error E_INVALIDARG

0x00007ffe85a4eda8 UnrealEditor-D3D12RHI.dll!UnknownFunction
0x00007ffe8591c5e3 UnrealEditor-D3D12RHI.dll!UnknownFunction
0x00007ffe8591d0fb UnrealEditor-D3D12RHI.dll!UnknownFunction
0x00007ffe85926801 UnrealEditor-D3D12RHI.dll!UnknownFunction
0x00007ffe859f8d27 UnrealEditor-D3D12RHI.dll!UnknownFunction
0x00007ffed2d7630a UnrealEditor-RHI.dll!UnknownFunction
0x00007ffed2d901c2 UnrealEditor-RHI.dll!UnknownFunction
0x00007ffed2d922a6 UnrealEditor-RHI.dll!UnknownFunction
0x00007ffeab552722 UnrealEditor-Core.dll!UnknownFunction
0x00007ffeab547d4a UnrealEditor-Core.dll!UnknownFunction
0x00007ffeab5481ee UnrealEditor-Core.dll!UnknownFunction
0x00007ffeab5559aa UnrealEditor-Core.dll!UnknownFunction
0x00007ffed2dc4aad UnrealEditor-RHI.dll!UnknownFunction
0x00007ffed2db80f8 UnrealEditor-RHI.dll!UnknownFunction
0x00007ffed2d98f35 UnrealEditor-RHI.dll!UnknownFunction
0x00007ffead89dd6d UnrealEditor-RenderCore.dll!UnknownFunction
0x00007ffead8dafc2 UnrealEditor-RenderCore.dll!UnknownFunction
0x00007ffead8ab8c5 UnrealEditor-RenderCore.dll!UnknownFunction
0x00007ff7abe5d94c UnrealEditor.exe!UnknownFunction
0x00007ff7abe55566 UnrealEditor.exe!UnknownFunction
0x00007ff7abe5589a UnrealEditor.exe!UnknownFunction
0x00007ff7abe59114 UnrealEditor.exe!UnknownFunction
0x00007ff7abe6bd04 UnrealEditor.exe!UnknownFunction
0x00007ff7abe6f0ba UnrealEditor.exe!UnknownFunction
0x00007fff08587374 KERNEL32.DLL!UnknownFunction

2

Locate the UE installation directory, navigate to the UE_5.8\Engine\Config folder, and double-click to open BaseEngine.ini. Under the [/Script/WindowsTargetPlatform.WindowsTargetSettings] configuration, add the line DefaultGraphicsRHI=DefaultGraphicsRHI_DX11. Done! Your UE can now start normally. Have fun, friend.